21104333213 has 16 divisors (see below), whose sum is σ = 21428789760. Its totient is φ = 20782658496.

The previous prime is 21104333209. The next prime is 21104333227. The reversal of 21104333213 is 31233340112.

It is a cyclic number.

It is not a de Polignac number, because 21104333213 - 2² = 21104333209 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21104333113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19029503 + ... + 19030611.

It is an arithmetic number, because the mean of its divisors is an integer number (1339299360).

Almost surely, 2^21104333213 is an apocalyptic number.

It is an amenable number.

21104333213 is a deficient number, since it is larger than the sum of its proper divisors (324456547).

21104333213 is a wasteful number, since it uses less digits than its factorization.

21104333213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2116.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 21104333213 its reverse (31233340112), we get a palindrome (52337673325).

The spelling of 21104333213 in words is "twenty-one billion, one hundred four million, three hundred thirty-three thousand, two hundred thirteen".